Atlas of Human Anatomy in Cross Section: Section 2. Neck, Shoulders, Upper Arm, and Upper Thorax (Lungs)
Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Jean J. Jew, M.D., and Paul
C. Reimann, B.S.
Peer Review Status: Externally Peer Reviewed
Upper Left Quadrant
Lower Left Quadrant
1. Vertebral plexus of vv., anterior
32. Triceps brachii, lateral head m.
This section passes through the manubrium (5, 103), sternoclavicular joints (9, 10, 101), trachea (105), esophagus (104), mesoesophagus (93), several bronchopulmonary segments (17, 42, 66, 95), the third (2) and fourth (48) thoracic vertebrae, scapulae (37, 40, 45, 56, 61, 64), and the humeri (30, 79).
The lungs are the dominant structures at this level. The following bronchopulmonary segments are identifiable: left lung, upper lobe and division, anterior segment (95) and apical posterior segment (66), and right lung, upper lobe, posterior (42) and apical (17) segments.
The muscles of the arm include the pectoralis minor (16, 92), biceps brachii, long (85) and short (84) heads, pectoralis major (13, 20, 23, 83), coracobrachialis (25, 82), latissimus dorsi (69, 80), deltoid (70, 74, 78), triceps brachii, lateral (32, 72) and long (36, 71) heads, teres major (34), subscapularis (44, 58, 68), teres minor (38, 63), and infraspinatus (41).
The nerves of the brachial plexus (22, 27, 28, 73, 75 77) are seen in the axilla.
The common carotid (6) and right subclavian (8) arteries are seen at their bifurcation from the right brachiocephalic trunk.
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